You must be very polite serving your future customers

Many wildlife habitats will be destroyed if man keeps polluting the environment.
2. If we dump all sorts of chemicals into rivers, we will not be able to swim in them in the future.
3. If we do not stop cutting down so many trees, we will endanger our oxygen supply.
4. Soon the Earth’s resources will be exhausted if the human population continues to grow.
5. If everybody continues to use aerosols and CFCs, the hole in the ozone layer will get bigger.
6. If the sun radiation can’t escape into space, Earth’s temperature will increase steadily.
7. If the global temperature rises, sea levels will rise too.
8. We’ll threaten our own existence if we do not cut down on waste rapidly.
9. People will run out of drinking water one day if they do not use it more rationally.
10. If he wants to help the planet, then he has to change his habits

Teenagers are very stressful and difficult people. it causes of their harmonical activity. they are depressed and often prefer listening music instead of talking to people. as it is a time of personal growing they have problems with parents. they argue and showing themselves. the same situation with their friends. usually they fight a lot, but nothing serious happens. sometimes because of influence of other people they making wrong decisions for example start smoking or tastes alcohol. but with patient of parents and family they will pass this period without serious problems.